: Basquins Law for a particular alloy is given by delta N f $=$ C $0\mathrm{.}2($MPa$)$ where the stress range, $,$ is in MPa; Nf is the number of cycles to failure; C is a constant.Smooth samples of the alloy have a fatigue life in fully$-$reversed loading of $4$ x$106$ cycles for a stress range, $,$ of $400$ MPa. Calculate the number of cycles to failure for a sample tested in fully$-$reversed loading with a stress range of $600$ MPa.